Finding the Fourth Proportional to 2,106.62, 2,907.39 and 1,222.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.62 : 2,907.39 = 1,222.46 : x
2. Step 2: Convert to fraction form
   2,106.62/2,907.39 = 1,222.46/x
3. Step 3: Cross multiply
   2,106.62x = 2,907.39 × 1,222.46
4. Step 4: Simplify right side
   2,106.62x = 3,554,167.98
5. Step 5: Solve for x
   x = 3,554,167.98/2,106.62
6. Step 6: Final answer
   x = 1,687.14